Patna
Nov. 24.
Officials of the Central Bureau of Investigation are keeping a watch on the two houses of Dr. Ranjit Singh and studying the papers it had recovered from the residences it raided in connection with the leakage of question papers relating to the Common Admission Test (CAT) of the IIM.

It is keeping a watch on the houses of some other doctors too whom it suspected to be having links with the kingpins in the racket.

The CBI has also sealed two houses belonging to Dr. Major and S. Chaudhary, as they were not present when it raided their premises here.